Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System

a technology of motor-driven mechanical systems and condition assessment, which is applied in the direction of impedence measurement, structural/machine measurement, instruments, etc., can solve the problems of unreliable current as an indicator of fault condition, unreliable approach, and inability to accurately assess the condition of the motor-driven mechanical system

Inactive Publication Date: 2007-12-06
NANYANG TECH UNIV
View PDF12 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] Advantageously, the admittance or impedance can be a reliable indicator of the mechanical system because it is not affected significantly or at all by distortion or fluctuation in the input signal from the power source that powers the motor.

Problems solved by technology

However, this approach has some drawbacks.
Thus, current may be unreliable as an indicator of fault condition, particularly when the normal input current is very low.
A drawback of this approach is that the input power is also affected by distortion in the power supply voltage and hence is not a reliable indicator for fault conditions.
However, a shortcoming of this approach is that it can be difficult to obtain an accurate electronic model for a motor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System
  • Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System
  • Method and Apparatus for Assessing Condition of Motor-Driven Mechanical System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024]FIG. 1 schematically illustrates an apparatus 10 for assessing the condition of a mechanical system 12 driven by an electric motor 14, such as for monitoring or diagnosing fault or the condition of mechanical system 12, exemplary of embodiments of the present invention. System 12 is conventionally referred to as a motor-driven mechanical system (MDMS). Motor 14 receives electrical power through an input which includes two input terminals 16, from a power source (PS) 18. Motor 14 can be any type of conventional electric motor. For example, motor 14 may be a DC motor, a synchronous motor, a poly-phase motor, a linear motor, or the like. PS 18 can be a single-phase supply as those directly accessible from wall socket, a DC supply, a three phase supply, or the like, depending on the motor used and how the motor is to be driven.

[0025] It should be understood that a MDMS can include both a mechanical load and the transmission from motor 14. The load may be in the form of any mechan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Conditions of a mechanical system driven (12) by a motor (14) can be assessed by monitoring an admittance or impedance at an input to the motor (14) over a period of time. The admittance or impedance may be determined by measuring the input voltage (22) and current (20). Variations in admittance or impedance are associated with known conditions including faults. An analyser (24) processes the admittance or impedance and provides a warning signal if a known fault condition is determined. The processing may be done using a neural processor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from U.S. Provisional Application No. 60 / 551,336, entitled “APPARATUS FOR SENSOR-LESS MONITORING AND DIAGNOSIS”, and filed Mar. 10, 2004, the contents of which are hereby incorporated herein by reference.FIELD OF THE INVENTION [0002] The present invention relates generally to motor-driven mechanical systems (MDMS), and more particularly to method and apparatus for assessing conditions of MDMS through motor input signals, including fault monitoring. BACKGROUND [0003] It is desirable to detect fault conditions early in motor-driven mechanical systems (MDMS), for example, in order to correct the fault condition or to prevent damage to the system or the motor. [0004] When the MDMS is driven by an electric motor, input signals to the motor have been used for monitoring and diagnosing mechanical problems associated with the driven machines as well as fault conditions in the motor. For example, the motor curren...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(United States)
IPC IPC(8): G01R27/16G01M13/02G01M13/04G01R31/06G01R31/34H02H1/00H02H3/40H02H7/085
CPCG01M13/025G01R31/343H02H7/085H02H3/40H02H1/0092
Inventor LING, SHIH-FUFU, LIANYU
Owner NANYANG TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap